Burwitz, V. High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society;
Andronov, I., Ostrova, N., & Burwitz, V. (2005). O - C analysis of FO Aqr, "king of intermediate polars". In C. Sterken (Ed.), The Light-Time Effect in Astrophysics: Causes and Cures of the O - C Diagram (pp. 229-234). San Francisco, CA, USA: Astronomical Society of the Pacific.